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Online since: August 2006
Authors: Jai Sung Lee, S.G. Kim, C.W. Lee
It is very well known that hollow particles have low density, high surface area, and distinct optical and mechanical properties [3].
However, the relations among the decomposition of iron acetylacetonate, process variables and powder properties still remain unsolved.
In CVC process, among various process variables affecting formation β-Fe2O3, the reaction temperature is considered as the most important process variable especially controlling phase evolution.
Finally, the properties of iron oxide nanoparticles investigated in this study and in the literature are summarized in Table 1.
The properties of iron oxide nanoparticles investigated in this study and the literature of the author (marked as *). 3. 2.
Online since: March 2012
Authors: Jia Chen, Ji Feng Xing, Xi Guang He
And based on this model, the control errors will be sharp, if the system works with large-scale varying inputs, strong disturbances and serious nonlinear factors [1,2].
As seen, optimal tracking control system is rarely affected by the varying duty, could follow the input continuously with a small error, and the stable error is .
The performance of optimal tracking control is affected by weight matrix's value, and this coincides with conclusions in [3]. 6.
Conclusion Factors such as nonlinearities of flow rates, asymmetries in the two motion directions, differences between volume changes and etc, cause the model of valve-controlled asymmetrical cylinder too complex to design an optimal controller.
[2] Junhong Yang, Ziqiang Yin, Shengyi Li: J. of Mechanical Eng., Vol. 42 No. 5 (2006), p. 203-207, in Chinese
Online since: May 2013
Authors: Xi Lu, Yong Xian Liu, Hong Mei Pang
Technology Spillover and Enterprise Innovation Cooperation in Complementary Products of Different Industries LU Xi 1,2,a, LIU Yongxian 1,b and PANG Hongmei 3,c 1 School of Mechanical Engineer & Automation, Northeastern University, Shenyang 110004, China 2 School of Management, Shenyang University of Technology, Shenyang 110870, China 3 School of Economics, Shenyang University of Technology, Shenyang 110870, China aylux@163.com, bliuyx@126.com, clittlelion_mei@163.com Keywords: core competitiveness, complementary product, R&D investment, production output Abstract.
Introduction With the patents, intellectual property and other achievements in the enterprise development more important obviously, R&D activities have become the embodiment of an enterprise's core competitiveness.
The model described the R&D cooperation competition model under the duopoly symmetric market structure, used backward induction to analyze R&D results, production, profits and other factors, compare the optimal R&D investment and output in the non-cooperation, semi-cooperation and cooperation situation, and yield the dynamic symmetric complete information model game in the case of the symmetrical R&D investments, overflow level and output[4].
Based on the analysis of technology transfer theory, Xu Bin (2008) deeply analyzed the factors affecting technology transformation of the Enterprise Institute, and focused on the establishment of cooperation and innovation mechanisms in the technology transfer of Enterprise Institute[7].
Online since: February 2012
Authors: A. Erman Tekkaya, Bernd-Arno Behrens, Annika Foydl, Insa Pfeiffer, Andreas Jäger, Matthias Kammler, Thorsten Matthias, Daniel Pietzka
The aim is to produce forging parts with locally adapted properties.
The mechanical properties of AA6082 used for the simulations were determined by means of upsetting tests at the IFUM using a servo hydraulic testing machine (Instron VHS 400 kN).The elastic-plastic properties of the embedded wires of the stainless steel X10CrNi18-8 (1.4310) were taken from the materials database of the FEA package.
The results of these investigations show for Tresca’s friction model with a factor of m = 1.0 good agreement of numerical and experimental determined material flow close to tool surfaces.
The position of the elements is mainly affected by the element position in the billet, the reinforcing element length itself and the extrusion ratio.
Analyses of the increasing mechanical strength of the reinforced forging parts compared to parts without reinforcements have to be carried out.
Online since: February 2011
Authors: B.H. Xu, Q.F. Liu, Y.Z. Sun, Shu Li Ding
It was shown that the particles of nano-kaolinite is very thin lamellar in shape, whose average thickness, average particle size, are 50 nm and 450 nm respectively. 1.Introduction The thickness of kaolin platelike particles significantly affects their dispersibility, agglomeration and rheological properties, whenever kaolin is used as a coating, pigment or filler in paper, ceramics, rubber, or polymers (Murray and Kogel, 2005; Ding et al., 2009).
Several author teams examined the mechanochemical effects of grinding of kaolinite on its structure and thermal behavior and subsequent thermal transformationsor sorption properties (Suraj et al., 1997).
The similar conclusions can be concluded that particles, <0.1μm, were difficult to preparation by traditional mechanical grinding or stirring.
Sound cavitation, which produce enormous acceleration and the high-speed collision blow among particles in liquid, is the most important factor in kaolinite of ultrasonic power delamination.
Influence of mechanical grinding to structure and granularity of clay mineral.
Online since: October 2014
Authors: Yu Ming Ma, Lin Liu
System Properties Hardware section of power distribution station computer monitoring system.
Unbalanced factor alarm: When the three-phase current or three-phase voltage transformation and distribution system imbalance (customizable range), the computer can automatically record the time, station number, loop through multimedia speakers sound alarm names
Resulting in system crash, software crash, system files are missing. ③Due to the different means of communication and surveillance systems used for event recording mode, the communication time is very important, it requires fast response aspects of surveillance systems have higher requirements. ④Interface capacity is not enough, the data of switch knife cannot be into the monitoring system so that intuitive wiring diagram is affected.
Beijing: Mechanical Industry Press, 2004; [3] Yang Yue.
Beijing: Mechanical Industry Press, 2003; [4]Zhang Wen-Liang,Tang Guang-Fu, Zha Kun-Peng etal.
Online since: July 2013
Authors: Kunal B. Modi, Rajesh J. Tayade, T.K. Pathak, N.H. Vasoya, Thillai Sivakumar Natarajan
The molecular structure and chemical properties of nitrobenzene are given in Table 1.
This may due the various factors such as morphology, surface area, optical bandgap, and density of the ferrite system.
However, in following section we have tried to explain some of the factors affecting in the photocatalytic activity of the composites.
Modi, Infrared spectroscopy and elastic properties of nanocrystalline Mg-Mn ferrites prepared by co-precipitation technique, J.
Modi, Synthesis of nanostructured material by mechanical milling and study on structural property modifications in Ni0.5Zn0.5Fe2O4,Ceram.
Online since: March 2017
Authors: Jakub Řehák, Josef Řehák, Eva Burgetová
This paper describes an interesting discovery in the basement of the monastery and presents conceptual design of remediation pointing out, at the same time, the risk factors.
Underground galleries and brick channels have often also ventilation function, when air flow and water vapours significantly affect moisture conditions of buildings.
Tywoniak,  Hydrophobic treatment of wood fibrous thermal insulator by octadecyltrichlorosilane and its influence on hygric properties and resistance against moulds, Composites Part B Engineering 106, 2016, 106 285-293.
Tichá, P.: Modeling Interior Environment of Historical Building and Determination of Critical Places for Application of Nanotextiles Protection. in: Advanced Materials, Structures and Mechanical Engineering.
Online since: July 2022
Authors: Eduardo García-Gil, Alberto Murillo-Marrodán, Hamed Aghajani Derazkola
For simplicity of the simulation, all tools were selected as non-deformable (rigid) objects with thermal properties and billet-selected as deformable object with thermal properties—the tools were meshed by different sizes and a uniform mesh was set for the billet.
The Cr13 steel billet was meshed by 3D tetrahedral P1+ linear elements with a bubble node, size factor of 0.7, volumic size factor of 2.2 and minimum 1.5mm mesh size.
This key factor helps to finish the piercing phase.
This phenomenon is affected by process time (Fig. 5d).
V Improving the wear resistance of structural steels through the use of metallurgical production factors.
Online since: May 2025
Authors: Luthfi Luthfi
Thermal Properties of Sago Pith Waste Reinforced Polyester Composites Luthfi1, a * 1Department of Mechanical Engineering, Politeknik Negeri Lhokseumawe, Lhokseumawe 24301, Indonesia aemail: luthfi@pnl.ac.id Keywords: sago pith waste, unsaturated polyester resin, Arduino, DS18B20 sensor, thermal conductivity.
In this study, SPW was utilized in manufacturing composite materials, and their thermal properties were investigated.
The thermal properties were measured using a test setup box equipped with a 100 W lamp as a heat source.
A variety of factors that could impact composites' thermal conductivity were covered.
They made important notes on the main factors that affect the overall thermal conductivity, which are the thermal conductivity of the filler used and the thermal conductance of the filler/matrix at the interface.
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